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<p>Ships experience rolling motion under the action of sea waves and may even face the risk of capsizing. Anti-rolling devices are designed to reduce this motion and enhance vessel safety. This is especially critical for engineering ships operating at sea under zero-speed conditions, where a stable posture is essential for efficient performance. Gyro stabilizers can suppress roll motion at zero speed; however, their high cost typically makes them unsuitable for large civilian vessels. Additionally, most existing anti-rolling devices rely on a certain water speed to function, which results in increased drag. In this study, an anti-rolling system incorporating swing control is proposed. Inspired by the human body’s ability to maintain balance by swinging arms during walking or running, the system generates an anti-rolling moment by oscillating a water tank. This approach operates independently of water speed and does not generate additional drag. The mechanical design of the anti-rolling system is introduced, and a corresponding control system model is derived. The swing-tank mechanism provides phase lead compensation and reduces the system’s sensitivity to wave disturbances. To enhance performance, robust control techniques are applied. Simulation results demonstrate that the proposed anti-rolling system delivers effective roll reduction for ships.</p>

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Active Anti-Rolling for Ships by Tank Swing and Robust Controller Design

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Yi-ping Zhang,
  • Ming-xiang Xie,
  • Xing-ying Ji,
  • Li Xu,
  • Xing-wang Zhang

摘要

Ships experience rolling motion under the action of sea waves and may even face the risk of capsizing. Anti-rolling devices are designed to reduce this motion and enhance vessel safety. This is especially critical for engineering ships operating at sea under zero-speed conditions, where a stable posture is essential for efficient performance. Gyro stabilizers can suppress roll motion at zero speed; however, their high cost typically makes them unsuitable for large civilian vessels. Additionally, most existing anti-rolling devices rely on a certain water speed to function, which results in increased drag. In this study, an anti-rolling system incorporating swing control is proposed. Inspired by the human body’s ability to maintain balance by swinging arms during walking or running, the system generates an anti-rolling moment by oscillating a water tank. This approach operates independently of water speed and does not generate additional drag. The mechanical design of the anti-rolling system is introduced, and a corresponding control system model is derived. The swing-tank mechanism provides phase lead compensation and reduces the system’s sensitivity to wave disturbances. To enhance performance, robust control techniques are applied. Simulation results demonstrate that the proposed anti-rolling system delivers effective roll reduction for ships.